lecture 5: in the beginning: radiometric dating 1.the age of the earth 2.radiometric dating - early...
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Lecture 5: In the Beginning: Radiometric Dating
1. The Age of the Earth2. Radiometric dating - early chronology
Meteorites - the stories they tell
• The Meteorite “Allende” (fell in 1969, Mexico)is ~30 Ma olderthan the Earth,and has isotopesfrom a Supernovathat exploded~4.60 Ga ago !
The Oldest Rocks on Earth
• The age of our Sun Sun’s age = 4 560 million years (= 4.56 Ga) helioseismology
• The age of our Earth Earth’s age = 4 530 million years radiometric dating of rocks